[][MAC80211][app][atenl: fix tx length]

[Description]
Fix tx length problem which causes some margin EVM failed issues.
The tx length set to driver should be added with a iee80211 header length.

[Release-log]
N/A

Change-Id: If0901ab6b10acd1ec1d6d4d15543951919e87220
Reviewed-on: https://gerrit.mediatek.inc/c/openwrt/feeds/mtk_openwrt_feeds/+/6111197
diff --git a/feed/atenl/src/atenl.h b/feed/atenl/src/atenl.h
index 4078825..22d867a 100644
--- a/feed/atenl/src/atenl.h
+++ b/feed/atenl/src/atenl.h
@@ -90,6 +90,7 @@
 
 	bool cmd_mode;
 
+	bool ibf_cal;
 	/* intermediate data */
 	u8 ibf_mcs;
 	u8 ibf_ant;